# Answer to Question #26086 in C++ for hanrik

Question #26086
The following formula gives the distance between two points (x1, y1) and (x2, y2) in the Cartesian plane: Given the center and a point on a circle, you can use this formula to find the radius of the circle. Write a program that prompts the user to enter the center and a point on the circle. The program should then output the circle&rsquo;s radius, diameter, circumference and area. Your program must have at least the following procedures:
a. distance: This function takes four numbers as its parameters that represent two points in the plane and returns the distance between them.
b. radius: This function takes as its parameters four numbers that represent the center and a point on the circle, calls the function distance to find the radius of the circle and returns the circle&rsquo;s radius.
c. circumference: This function takes as tis parameter a number that represents the radius of the circle and returns the circle&rsquo;s circumference.
d. area: Represents the radius of the circle and returns the circle&rsquo;s area
1
2013-03-13T06:32:44-0400
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